916 Ti‑Touch - Manual

Importance of the Topic

Volumetric titration remains a cornerstone of quantitative analytical chemistry in research, quality control, and industrial laboratories. Modern titration systems must combine accuracy, reproducibility, and streamlined workflows to meet the demands of regulated environments and high-throughput applications. Integration of titration hardware with digital data management, user administration, and audit trails ensures compliance with GLP and FDA 21 CFR Part 11, while supporting method standardization and robust reporting.

Aims and Overview of the Device

The 916 Ti-Touch is a compact, touchscreen-driven titrator by Metrohm, designed to perform a full range of volumetric titrations and potentiometric measurements in one unit. It integrates a color touch display, titrant dosing interface, stirrer option, and network connectivity into a single standalone instrument. Methods, titrants, sensors, and results are managed in onboard memory or via USB and Ethernet, facilitating data backup, method exchange, and LIMS/PC interfacing.

Instrumentation Used

• 916 Ti-Touch with built-in magnetic stirrer or external propeller stirrer
• MSB-compatible dosing modules (800 Dosino, 805 Dosimat) and stirrers
• 854 iConnect interface for smart electrodes (iTrodes)
• USB devices: flash drives, printers, PC keyboard, barcode reader, USB-RS232 adapter for balances
• Ethernet connection for shared network storage, remote printing, and e-mail alarms
• Optional Sample Processors (814, 815, 810) for automated sample handling and rack management
• AuditTrailViewer software for export and filtering of audit trails

Main Features and Functions

• Titration modes: Dynamic equivalence (DET), Monotonic equivalence (MET), Endpoint (SET), STAT (controlled endpoint), Manual (MAT), plus direct measurements (MEAS) and pH electrode calibration (CAL).
• Touchscreen interface with fixed keys for Home, Back, Help, Print, Manual, Start, Stop.
• Method editor: customizable command sequence, conditional jumps, remote I/O control, programmable loops, and subsequences.
• File manager: internal and external memory organization, file grouping, backup/restore, sample tables, result tables, PDF/PC-LIMS report generation.
• System settings: multi-language UI, date/time, security and user administration with password policies, electronic signatures, audit trail configuration.
• GLP manager: automatic self-test at startup, documentation of measurement/titration tests, system validation, service and backup scheduling.
• Device manager: configuration and monitoring of sensors, titrants, reagents, balances, printers, remote interfaces, and network parameters.
• Automatic sample table and sample assignment functions to link sample IDs to methods and automate large series.

Benefits and Practical Utilization

• Provides a streamlined, intuitive workflow via touchscreen, minimizing operator training and errors.
• Ensures traceability of methods and determinations with audit trail, electronic signatures, and user-specific routines.
• Supports GLP and 21 CFR 11 compliance through configurable audit logs, password control, and validation tools.
• Flexible connectivity to balances, printers, LIMS, and networks enhances lab integration and data management.
• Automation compatibility with Sample Processors reduces manual handling, increases throughput, and improves reproducibility.

Future Trends and Application Possibilities

• Cloud-based method sharing and remote monitoring for multi-site laboratories.
• AI-driven titration optimization, auto-titration parameter tuning, and real-time data analytics.
• Expanded IoT integration with laboratory information systems and predictive maintenance alerts.
• Advanced sensor interfaces and multi-channel titration modules for simultaneous multi-sample analysis.

Conclusion

The 916 Ti-Touch system represents a modern, fully integrated solution for volumetric titration and potentiometric analysis in research and QA/QC environments. Its combination of touchscreen operation, comprehensive method programming, robust data management, and compliance features make it well suited to demanding laboratory workflows and regulatory requirements. By supporting full automation, network integration, and electronic record-keeping, it helps laboratories improve efficiency, data integrity, and method standardization.

References

None provided